Hermit Crab only tank

[skabooya]

This is something I have been thinking about for a while now. It will be for a second classroom tank. I have one planted which is a big hit. I would like to have a small saltwater one as well but very low maintenance.

Here is what I was thinking.
Get a small all in one pico tank or those nice betta kits. (light, filter, tank, etc)
Inside put a chunk of LR and only have 1 or 2 hermits (blue leg) and a bunch of shells.
Thats it. No coral, nuisance algae is fine.


Thoughts?